Is your feature request related to a problem? Please describe.
There's no way to remove items from the "Junk" or "Useful" lists. I can only move items between them.

Describe the solution you'd like
A remove button would be nice.

Describe alternatives you've considered
Editing SavedVariables. Not fun.

Why?

If I mark something as junk by mistake (or change my mind), I'd prefer the item not cluttering the "useful" list forever. A remove option would be a way to restore Scrap to default behavior for that item.

I've actually disabled scrap for now as I don't want to loose items I sold once and it added it to the scrap list.
Incidentily my scrap list is always empty in ui.

Scrap list is always empty for me too, it never worked on my WoW install, and my installed addons list is pretty small.